diff --git a/nginx/default.conf b/nginx/default.conf
index b698731..595cf1f 100644
--- a/nginx/default.conf
+++ b/nginx/default.conf
@@ -17,11 +17,6 @@ server {
     location /socket.io {
         rewrite /backend/(.*) /$1 break;
         proxy_pass http://backend;
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection "Upgrade";
-        proxy_set_header Host $host;
-        proxy_hide_header 'Access-Control-Allow-Origin';
     }
 
     location / {